Skypiea has deep emotional resonance across both Japanese and international fanbases, and Enels villain status gives him a collector profile that doesnt depend on competitive play relevance
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(It's an artifact with ", , Sacrifice this artifact: Target creature you control explores
The last Pokmon TCG Pocket Booster Set was called Paldean Wonders, and it came with Sprigatito, Fuecoco, and Quaxley, who are the first partner Pokmon of Paldea, one of the regions of Pokmon World, and they appear as sprites in Super Smash Bros
Your opponent does get a lot more control over what they sacrifice (usually)
But it's the Blood Artist effect itself, that ability to drain opponents' life away, that makes Nether Traitor a really good inclusion